CALIBER Obesity phenotype

person Phenotype Obesity
person Type Categorical, disease or syndrome
person Data sources Primary care (CPRD), hospital admission data (HES)
person Clinical Terminologies Read, ICD-10, ICD-9, OPCS-4
person Valid event date range 01/01/1999 - 01/07/2016
person Sex Female/Male
person Agreed 23.11.2012 (Revision 2)
person Authors Julie George, Emily Herrett, Liam Smeeth, Harry Hemingway

Primary Care (incident)

In the Clinical Practice Research Datalink (CPRD, primary care data) we ascertained cases by searching for Read terms:


Read codeRead termCALIBER category
22A6.00 O/E - Underweight Underweight
22K3.00 Body Mass Index low K/M2 Underweight
22K6.00 Body mass index less than 20 Underweight
8B5B.00 Weight gain diet Underweight
R034800 [D]Underweight Underweight
ZC2CN00 Dietary advice for weight gain Underweight
22K1.00 Body Mass Index normal K/M2 Normal weight
22K8.00 Body mass index 20-24 - normal Normal weight
22A4.11 O/E - overweight Overweight
22K4.00 Body mass index index 25-29 - overweight Overweight
1444.00 H/O: obesity History of obesity
212Q.00 Obesity resolved History of obesity
13A3.00 Weight reducing diet Possibly overweight/obese
13AC.00 Diabetic weight reducing diet Possibly overweight/obese
22A8.00 Weight loss from baseline weight Possibly overweight/obese
66C..00 Obesity monitoring Possibly overweight/obese
66C..11 Weight monitoring Possibly overweight/obese
66C1.00 Initial obesity assessment Possibly overweight/obese
66C2.00 Follow-up obesity assessment Possibly overweight/obese
66C4.00 Has seen dietician - obesity Possibly overweight/obese
66C7.00 Treatment of obesity stopped Possibly overweight/obese
66C9.11 Weight loss advised Possibly overweight/obese
66CC.00 Wants to lose weight Possibly overweight/obese
66CD.00 Difficulty maintaining weight loss Possibly overweight/obese
66CG.00 Weight management programme offered Possibly overweight/obese
66CH.00 Weight management plan started Possibly overweight/obese
66CJ.00 Weight management plan completed Possibly overweight/obese
66CZ.00 Obesity monitoring NOS Possibly overweight/obese
8B57.00 Weight reducing diet Possibly overweight/obese
8CA4011 Patient advised to lose weight Possibly overweight/obese
8HHH.00 Refer to weight management programme Possibly overweight/obese
8IAM.00 Referral to weight management service declined Possibly overweight/obese
9N4v.00 Did not attend weight monitoring clinic Possibly overweight/obese
9OK..00 Obesity monitoring admin. Possibly overweight/obese
9OK..11 Obesity clinic administration Possibly overweight/obese
9OK1.00 Attends obesity monitoring Possibly overweight/obese
9OK2.00 Refuses obesity monitoring Possibly overweight/obese
9OK3.00 Obesity monitoring default Possibly overweight/obese
9OK4.00 Obesity monitoring 1st letter Possibly overweight/obese
9OK5.00 Obesity monitoring 2nd letter Possibly overweight/obese
9OK6.00 Obesity monitoring 3rd letter Possibly overweight/obese
9OK7.00 Obesity monitoring verbal inv. Possibly overweight/obese
9OK8.00 Obesity monitor phone invite Possibly overweight/obese
9OKA.00 Obesity monitoring check done Possibly overweight/obese
9OKZ.00 Obesity monitoring admin.NOS Possibly overweight/obese
ZC1..00 Actions to lose weight Possibly overweight/obese
ZC16.00 Abuse of drugs to lose weight Possibly overweight/obese
ZC17.00 Exercising to lose weight Possibly overweight/obese
ZC1A.00 Excessive exercising to lose weight Possibly overweight/obese
ZC2C700 Patient advised about weight-reducing diet Possibly overweight/obese
ZC2C711 Dietary advice for weight reduction Possibly overweight/obese
ZC2CM00 Dietary advice for obesity Possibly overweight/obese
ZC2CO00 Dietary advice for weight loss Possibly overweight/obese
ZG53100 Patient advised to lose weight Possibly overweight/obese
ZV65319 [V]Dietary counselling in obesity Possibly overweight/obese
222A.00 O/E - obese Obese
22A5.11 O/E - obese Obese
22K2.00 Body Mass Index high K/M2 Obese
22K5.00 Body mass index 30+ - obesity Obese
66C5.00 Treatment of obesity changed Obese
66C6.00 Treatment of obesity started Obese
66CE.00 Reason for obesity therapy - occupational Obese
6B4..00 Counterweight weight management programme Obese
6B4..11 Counterweight programme Obese
C38..00 Obesity and other hyperalimentation Obese
C380.00 Obesity Obese
C380000 Obesity due to excess calories Obese
C380100 Drug-induced obesity Obese
C380400 Central obesity Obese
C380500 Generalised obesity Obese
C38z.00 Obesity and other hyperalimentation NOS Obese
C38z000 Simple obesity NOS Obese
Cyu7.00 [X]Obesity and other hyperalimentation Obese
Cyu7000 [X]Other obesity Obese
L161.12 Maternal obesity syndrome Obese

Bariatric surgery

Read codeRead termCALIBER category
7613600 Maintenance of gastric band History of bariatric surgery
761A500 Removal of gastric band History of bariatric surgery
ZV45P00 [V]Presence of gastric bypass History of bariatric surgery
7613.00 Plastic operations on stomach Possible bariatric surgery
7613000 Gastroplasty NEC Possible bariatric surgery
7613y00 Other specified plastic operation on stomach Possible bariatric surgery
7613z00 Plastic operation on stomach NOS Possible bariatric surgery
7611400 Sleeve gastrectomy and duodenal switch Bariatric surgery
7611500 Sleeve gastrectomy NEC Bariatric surgery
7611600 Laparoscopic sleeve gastrectomy Bariatric surgery
7613100 Partitioning of stomach Bariatric surgery
7613111 Mason vertical banded gastroplasty Bariatric surgery
7613200 Laparoscopic adjustable gastric banding Bariatric surgery
7613300 Partitioning of stomach using band Bariatric surgery
7613400 Partitioning of stomach using staples Bariatric surgery
7613500 Partitioning of stomach NEC Bariatric surgery
7614100 Bypass of stomach by anastomosis of stomach to duodenum Bariatric surgery
7615000 Bypass stomach by anastomosis stomach to transposed jejunum Bariatric surgery
7616000 Bypass of stomach by anastomosis of stomach to jejunum NEC Bariatric surgery
7616013 Mason high gastric bypass Bariatric surgery
7616015 Printer high gastric bypass Bariatric surgery
7616600 Laparoscopic gastric bypass Bariatric surgery
761A.00 Other open operations on stomach Bariatric surgery
7633.00 Bypass of jejunum Bariatric surgery
7633000 Bypass of jejunum by anastomosis of jejunum to jejunum Bariatric surgery
7633100 Bypass of jejunum by anastomosis of jejunum to ileum Bariatric surgery
7633200 Bypass of jejunum by anastomosis of jejunum to colon Bariatric surgery
7633y00 Other specified bypass of jejunum Bariatric surgery
7633z00 Bypass of jejunum NOS Bariatric surgery
7642500 Duodenal switch Bariatric surgery

Read terms are hierarhically organized in top-level chapters i.e. chapter G....00 is related to Circulatory System Diseases and sub-headings i.e. heading G2...00 is related to Hypertensive Heart Disease while G3...00 is related to Ischaemic Heart Disease.

Secondary Care (incident and prevalent)

In Hospital Episode Statistics (HES, hospital admission data) we used ICD-10 codes (see below) for diagnosis when marked as the primary diagnosis i.e. the main condition treated or investigated during the relevant episode of healthcare. We used the date of admission to hospital as the date of the event.


ICD-10 codeICD-10 termCALIBER category
E66 Obesity Obese

Bariatric surgery

OPCS-4 codeOPCS-4 termCALIBER category
G271 NA Procedure performed
G272 NA Procedure performed
G273 NA Procedure performed
G274 NA Procedure performed
G275 NA Procedure performed
G278 NA Procedure performed
G279 NA Procedure performed
G284 NA Procedure performed
G285 NA Procedure performed
G303 NA Procedure performed
G304 NA Procedure performed
G315 NA Procedure performed
G316 NA Procedure performed
G324 NA Procedure performed
G325 NA Procedure performed
G335 NA Procedure performed
G336 NA Procedure performed
G387 NA Procedure performed
G716 NA Procedure performed
G281 NA Procedure performed
G282 NA Procedure performed
G283 NA Procedure performed
G288 NA Procedure performed
G289 NA Procedure performed
G301 NA Procedure performed
G302 NA Procedure performed
G308 NA Procedure performed
G309 NA Procedure performed
G311 NA Procedure performed
G312 NA Procedure performed
G313 NA Procedure performed
G314 NA Procedure performed
G318 NA Procedure performed
G319 NA Procedure performed
G310 NA Procedure performed
G321 NA Procedure performed
G322 NA Procedure performed
G323 NA Procedure performed
G328 NA Procedure performed
G329 NA Procedure performed
G320 NA Procedure performed
G331 NA Procedure performed
G332 NA Procedure performed
G333 NA Procedure performed
G338 NA Procedure performed
G339 NA Procedure performed
G330 NA Procedure performed
G388 NA Procedure performed
G481 NA Procedure performed
G482 NA Procedure performed
Not applicable.
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